We can create the site link bridge using the New-ADReplicationSiteLinkBridge cmdlet:

New-ADReplicationSiteLinkBridge -Name "London-Canada-Bridge" -SiteLinksIncluded "London-Canada","London-CanadaDRLink"

The preceding command creates new site link bridge called London-Canada-Bridge using two site links: London-Canada, London-CanadaDRLink.

Using the Set-ADReplicationSiteLinkBridge cmdlet, the existing site link bridge value can change:

Set-ADReplicationSiteLinkBridge -Identity "London-Canada-Bridge" -SiteLinksIncluded @{Remove='London-CanadaDRLink'}

The preceding command will remove the London-CanadaDRLink site link from the existing site link bridge, London-Canada-Bridge:

Set-ADReplicationSiteLinkBridge -Identity "London-Canada-Bridge" -SiteLinksIncluded @{Add='London-CanadaDRLink'}

The preceding command will add the given site link to the existing site link bridge.